| 摘要 |
<p>There is disclosed a direct acting lock mechanism to secure a tool (10) within a driver (26) which is useful for securing open channel sockets (31) used to securing aerospace fasteners in a driver. These sockets (31) have a flatted shank (14), typically hexagonal in cross section, and are received in a socket receptacle (24) of the driver (26) which has a cross section matching that of the shank (14). In the preferred embodiment, the flatted surfaces (18) of the shank (14) are formed to have substantially coextensive flats (17) which are displaced through an angular increment of at least about 15 degrees. The flats (17) do not extend the entire length of the shank (14), however, thus providing a thin shelf (19) which has a cross section which matches the internal flatted surface of the socket receptacle (24) of the driver (26). The driver (26) has an annular internal groove (22) on the inside wall of its socket receptacle (24) and that groove (22) is located at an intermediate height in the socket receptacle (24) to align with the thin shelf (19) of the shank (14) when the socket shank (14) is placed in the socket receptacle (24) of the driver (26). The shank (14) of the tool (10) is received in the driver receptacle (24) with the shelf (19) received in the groove (22) and locks in the tool (10) upon a slight degree of rotation. <IMAGE></p> |
